TowerPro MG995 調査そして疑惑

Japanese forums

http://frontierproject.blog27.fc2.com/blog-entry-28.html

English forums

http://www.rcgroups.com/forums/showthread.php?t=442171

Any one try this servo before?
The price looks good!

Thanks!

6.0V 0.13sec / 60 degrees and below $100 is an pretty price!!!!

I'm still concerned about the speed......someone said 0.13sec & 0.23sec

Which one is true!

我起e-bay見到係0.19sec(6.0v)

Specification :

  

Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-7.2 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.20sec/60 degrees
Operating Speed (6.0V): 0.19sec/60 degrees
Stall Torque (4.8V): 9kg.cm
Stall Torque (6.0V): 11kg.cm
Operating Angle: 45 Deg. one side pulse traveling 400usec
360 Modifiable: Yes
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Current Drain (4.8V): 8.8mA/idle and 350mA no load operating
Current Drain (6.0V): 9.1mA/idle and 450mA no load operating
Dead Band Width: 4 usec
Motor Type: 3 Pole Ferrite
Potentiometer Drive: Indirect Drive
Bearing Type: Dual Ball Bearing
Gear Type: All Metal Gears
Connector Wire Length: 11.81" (300mm)
Dimensions: 1.59" x 0.77"x 1.48" (40.6 x 19.8 x 37.8mm)
Weight: 1.94oz. (55.2g)

之前我買左隻比我部st用 幾好呀  夠力 速度都夠  係衰在一樣野 拎起部車時轉有輕微回彈姐 d靚野係冇回彈 不過落左地都一樣冇回彈 100$ 當買隻原裝玩都抵啦 我用我果套大碌都可以係石屎地原地轉 都仲係 發發聲

[ 本帖最後由 iCoke 於 2006-5-25 13:26 編輯 ]

Thanks all!

It sounds worth to try on cheap cheap RC......

原帖由 SunLi 於 2006-5-25 22:17 發表
Thanks all!

It sounds worth to try on cheap cheap RC......

YA~~~~100$用黎粗玩 燒左都唔心通啦  當燒隻3003
不過我玩左咁多次都未燒................. 不過我覺得最好唔好比油門用 太大力 剎車時 sevor and sevor架同偈成份郁 要set到佢岩岩好唔好頂得太行就冇問題既

睇黎好似真係好抵玩咁.... 下次過開黎香港戈時買返幾隻先.. haha!!!!

原帖由 SunLi 於 2006-5-25 10:17 PM 發表
Thanks all!

It sounds worth to try on cheap cheap RC......

You buy, I buy ar~~Prince Sunny

MG995 is excellent for monster truck, high torque, fast , durable and most important – it is very cheap. I can't find any other servro can compete with it at this price range. I also tried blue bird but it just burned out in couples of run for my savage. Only one drawback of MG995 is power consuming but you should agree that no lunch in the world, right?

gonna buy one to be a steering servo!

原帖由 SunLi 於 2006-5-26 10:36 AM 發表
gonna buy one to be a steering servo!

if you are going to buy, pls help me to buy one more, thanks

原帖由 mark999hk 於 2006-5-26 10:39 發表


if you are going to buy, pls help me to buy one more, thanks

Fine.
Which RC you will use to be?

原帖由 SunLi 於 2006-5-26 10:41 AM 發表


Fine.
Which RC you will use to be?

...........yokomo MR4

Sander,

I received the MG995 yesterday. After plug it in my receiver, I noticed that the servo was overshooting. Then I run to the web to find some review for this servo, and found yours. You review seems to be very complete (as impressions ) and I agree with everything. I did not have the chance to mount in my airplane yet, but I will do in the weekend.

For me, this servo is good for the budget, but it's not acceptable a servo that has overshoot. This overshoot is so big that you can see without put in the airplane. If you look to the servo arm you can see. When you link it to any surface, your will multiply by 5x this effect.

I wont recomend this servo for any serious application too. For me, I would only use in some car or a big foot steering. (due to the overshoot)

5. the servo-amp is not well matched to the motor/geartrain/feedback pot. In essence, this mismatch manifests itself as significant overshoot when the servo is repositioning. This is to say that if you command the servo to move clockwise to a position, it will actually move past that position (by 3 degrees or so) then move back to the correct position.

does anybody know what he means by overshooting? is it the angle of horn movement that he is referring to? thanks.

原帖由 雷公 於 2006-5-26 11:28 發表

does anybody know what he means by overshooting? is it the angle of horn movement that he is referring to? thanks.

I believe so, I think he was refering to the angle of horn movement.

會唔會係指佢震ar?!!?